Article 40 of the Procurement Law of People's Republic of China (PRC) shall follow the following procedures: (1) Set up an inquiry team. The inquiry team consists of representatives of the purchaser and relevant experts, with an odd number of more than three, of which the number of experts shall not be less than two thirds of the total number of members. The inquiry team shall stipulate the price composition of the purchased items and the criteria for evaluating the transaction. (two) to determine the list of suppliers to be inquired. According to the purchasing demand, the inquiry team determines at least three suppliers from the list of suppliers with corresponding qualifications, and sends an inquiry notice to them for quotation. (3) ask. The inquiry team asked the inquired supplier to quote a price that cannot be changed at one time. (4) Determine the supplier of the transaction. The purchaser shall determine the clinched supplier according to the principles of meeting the purchase demand, equal quality and service, and lowest quotation, and notify all suppliers who have not clinched the deal after the query results.